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3632 SANDY BROOK DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

4 bed2 bath1,280 sqftBuilt 2006

Property at a Glance

This home is estimated between $245,468 and $403,194, with a best estimate of $336,126. That places the property above the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056, in a neighborhood that declined 4.7% over the past year.

Estimated Value Range

$245,468 $403,194
Best Estimate
$336,126
WCAD Value
$372,665
High Confidence

Based on 5 comparable properties(5 in the same subdivision)

Based on 5 comparable properties in R409599G - STONEY BROOK - ALL SECTIONS, this home's estimated market value is between $245,468 and $403,194. All 5 comparables are in the same subdivision, giving this estimate high confidence.

Comparable Properties (5)

3628 SANDY BROOK DR, ROUND ROCK, TX 78665
0.01 mi 100% similar Same subdivision
3 bed 2 bath 1,500 sqft Built 2009
Raw Value $289,525
Adjusted Value $250,919

Adjusted -$50,940 for 220 sqft less living space and +$12,334 for being newer. Net adjustment: -$38,606.

3624 SANDY BROOK DR, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
4 bed 2 bath 1,611 sqft Built 2007
Raw Value $408,657
Adjusted Value $336,126

Adjusted -$76,642 for 331 sqft less living space and +$4,111 for being newer. Net adjustment: -$72,531.

1547 HAYNIE BND, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,493 sqft Built 2009
Raw Value $282,453
Adjusted Value $245,468

Adjusted -$49,319 for 213 sqft less living space and +$12,334 for being newer. Net adjustment: -$36,985.

1543 HAYNIE BND, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,260 sqft Built 2007
Raw Value $386,000
Adjusted Value $394,742

Adjusted +$4,631 for 20 sqft more living space and +$4,111 for being newer. Net adjustment: +$8,742.

3640 SANDY BROOK DR, ROUND ROCK, TX 78665
0.02 mi 100% similar Same subdivision
3 bed 2 bath 1,050 sqft Built 2006
Raw Value $349,938
Adjusted Value $403,194

Adjusted +$53,256 for 230 sqft more living space. Net adjustment: +$53,256.

The Neighborhood

This home is valued 13.6% above the R409599G - STONEY BROOK - ALL SECTIONS median of $328,056. With 197 homes in the subdivision, the property sits in the upper tier. Note that values in this subdivision declined 4.7% over the past year.

R409599G - STONEY BROOK - ALL SECTIONS

typical
197 Properties
$328,056 Median Value
-4.7% YoY Change
0% Have Pool
100% Have Garage
This Home
$372,665
Median
$328,056

This home is +13.6% above the subdivision median.

Tax Analysis

The estimated annual property tax is $6,705 across all districts. With a homestead exemption claimed, that drops to $5,386 — saving $1,319 per year. That's $449 per month a buyer should budget. The assessed value increased roughly in line with the neighborhood, so a tax protest is unlikely to yield significant savings.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$3,328
Round RockCity0.3720%$1,386
Williamson CountyCounty0.3694%$1,377
Austin Community Collegespecial0.1034%$385
Williamson County FM/RdCounty0.0443%$165
Upper Brushy Creek WCIDWater0.0170%$63
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.7993%$6,705

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $336,126 would pay approximately $2,098 per month (principal and interest only, excluding taxes and insurance).

Data sourced from Williamson County Appraisal District (WCAD), Texas Education Agency (TEA), and Federal Reserve Economic Data (FRED). Assessment values reflect the appraisal district's estimate, not market sale prices. Report generated 4/18/2026.

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